Abstract
In this research work, we report the synthesis of novel biodegradable synthetic thickener able to provide good quality prints with reduced wastewater pollution. Biodegradable triglyceride polylactic acid (TGPLA) star polymer hydrogel was prepared via one-pot reaction by direct polycondensation of lactic acid and glycerol. The chemical structure of the produced polymer was determined By Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (1H-NMR), and gel permeation chromatography (GPC). The rheological properties and biodegradation of the novel thickening agent were investigated. The prints quality of the prepared thickening hydrogels increased with increasing lactic acid content, while the apparent viscosity and biodegradation rate increased. Technical evaluation of TGPLA as environmentally friendly thickening agent in printing of different fabrics was studied. In addition, the chemical oxygen demand (COD) and biological oxygen demand (BOD) were described. The use of such thickening composite in printing such variety of fabrics with pigment and different types of dyes including reactive, acid, metal complex, basic, and disperse dyes was described. It was established that the TGPLA composite paste is characterize by a non-Newtonian pseudoplastic performance, and their apparent viscosity increases upon neutralization. Printing pastes are very stable against storing compared to mypro-gum as natural thickener. Printing pastes thickened with TGPLA containing a ratio of 98% of lactic acid and 2% of glycerol; display similar K/S values and colorfastness properties compared to those prints from commercial synthetic thickeners.
Highlights
The use of biodegradable additives able to provide good quality prints with reduced wastewater pollution attracted recently significant attention [1,2]
Novel biodegradable triglyceride polylactic acid TGPLA cross-linked polymer hydrgel was prepared via one-pot reaction by thermal polycondensation of lactic acid and glycerol at different ratios in presence of sulfuric acid as a catalyst
The chemical structure of the TGPLA polymer was demonstrated by Fourier transform infrared spectroscopy (FT-IR), 1H-NMR, and gel permeation chromatography (GPC)
Summary
The use of biodegradable additives able to provide good quality prints with reduced wastewater pollution attracted recently significant attention [1,2]. Polyacrylic acids synthetic thickeners are extensively used in textile printing [3,4,5]. Polyacrylates are prepared from acrylic acid which causes severe irritation to skin and respiratory tract, while high exposure could result in pulmonary edema. Polyacrylic acid as synthetic thickener usually displays poor outline sharpness of prints and is not biodegradable, leading to higher wastewater pollution [4]. The uses of natural thickeners in textile printing cause fabric stiffness and exhibit no stability for storing [12,13,14,15]. Oil-based biopolymers possess various advantages compared to polymers from petroleum-based monomers which are not biodegradable and, in many cases, more expensive than the biodegradable oil-based biopolymers [22,23,24]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
